Polyphyletic Origin of Ornamental Goldfish


Mitochondrial DNA fragment of cytb was compared in all species Carassius auratus complex and three forms of ornamental goldfish. It is shown that the phylogenetic relationships between complex species correspond to the existing views, based on mtDNA data and geographical distribution. All forms of ornamental goldfish have a monophyletic origin from Chinese goldfish C. auratus auratus. The analysis showed that three nuclear genes (rps7, GH1 and Rh) in the two forms of ornamental goldfish (Oriental twintail goldfish and Chinese Ranchu) were almost identical C. auratus auratus genes, while all three gene in another more simple form of goldfish (common goldfish) were highly homologous to carp Cyprinus carpio nuclear genes. The obtained data suggested that in the history of aquarium goldfish breeding occurred the stage of distant hybridization between goldfish and common carp. Subsequently, the nuclear genomes of some ornamental forms could be enriched by goldfish genes (a relatively recent form as Oriental twintail goldfish and Chinese Ranchu) or common carp genes (the simplest and most ancient forms like common goldfish) as a result of multidirectional breeding and selection of aquarium goldfish various forms.

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Podlesnykh, A. , Brykov, V. and Skurikhina, L. (2015) Polyphyletic Origin of Ornamental Goldfish. Food and Nutrition Sciences, 6, 1005-1013. doi: 10.4236/fns.2015.611104.

Conflicts of Interest

The authors declare no conflicts of interest.


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